Drilling, riveting, and like machine



C. JACKSON.

DRILLING, RIVETING,AND LIKE MACHINE. I

APPLICATION FILED JUNE I, 1918.

1,338,019. Patented Apr. 27, 1920.

2 SHEETS-SHEET I.

l'mve/wboz m (or w/// Jackson C. JACKSON. DRILLING, RIVETING, AND LIKE MACHINE.

APPLlCATlON FILED JUNE 1, 1918.

Patented Apr. 27, 1920.

2 SHEETS-SHEET 2.

GORWILL JACKSON, OF KALAMAZOO, MICHIGAN.

V DRILLING, RIVETING, AND LIKE MACHINE.

Specification of Letters Patent.

Patented Apr. 27, 1920.

Application filed June 1, 1918. Serial No. 237,761.

To all whom it may concern: I

Be it known that I, CoRwrL JAoKsoN, a citizen of the United States, residing at the city and county of Kalamazoo, State of Michigan, have invented certain new and useful Improvements in Drilling, Riveting, and like Machines, of which the following is a specification.

This invention relates to improvements in drilling, riveting and'like machines.

My improvements are illustrated in the accompanying drawing asI have embodied the same in a rock drilling machine. My improvements may be readily adapted and, in fact the structure illustrated may, by providing a suitable tool, be efficiently used as a riveting machine.

The main objects of this invention are:

First, to provide an improved machine of this type in which the impact means may be thrown out of operation without stopping of the motor.

Second, to provide an improved machine of the class indicated which is highly efficient.

Third, to provide an improved machine of the class indicated which is very easily controlled.

Fourth, to provide an improved machine of the class indicated which is simple and durable in structure and very easily manipulated.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

I accomplish the objects of my invention -by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodi- .ment of my invention is clearly illustrated in the accompanying drawing, forming a part of this specification, in which:

Figure I is a side view of a structure embodying the features of my invention, the tool being partially broken away.

Fig. II is a longitudinal section on a line corresponding to line 2-2 of Fig. III, various parts being shown in full lines for convenience in illustration.

Fig. III is a transverse section on a line corresponding to line 3-3 of Figs. I, II and VIII,

Fig. IV is a detail section on a line corresponding to line 4-4 of Figs. I and II, showing details of the control for the impact means.

Fig. V is a transverse section on a line corresponding toline 55 of Figs. I and II, showin details of the impact means.

Fig.

VIII, showing details of the tool retaining means.

Fig. VII is a front elevation of the tool retaining means, the tool being shown in section.

Fig. VIII is a detail side elevation of certain parts looking from the right of Fi III.

n the drawing similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, 1 represents a tripod or other support having facing Ways 2 therein for the sliding base 3 of the casinglike mainframe 4, which constitutes a housing forthe operative parts.

In the structure illustrated the motor casing 5 is provided with a shoulder 6 fitting into the rear end of the main frame 4. This is best shown in Fig. II. The motor casing is provided with bearings 7 and 8 at its ends for the motor shaft 9. As the details of the motor form no part of my present invention they are not further illustrated or described herein.

Alined with the motor shaft 9 is a driving shaft 10, there being a bearing 11 for the driving shaft in the end wall of the motor casing 5. The driving shaft is provided with a socket adapted to receive the tanglike extension 12 of the motor shaft. The driving shaft is further supported by a bearing 13 spaced from the motor casing so as to permit the fiy-wheel 14 being arranged upon the driving shaft between these bearings.

Parallel to the driving shaft I mount a chuck 15, the chuck being open at its rear end to permit the drill or other tool, as 16, to project therethrough. The tool 16 extends through the chuck so as to be engaged by the hammer or impact'member 17 which is mounted to reciprocate in the bearing 18. The chuck 15 is rotated or driven from the driving shaft 10, the driving connections I is a transverse section on a line' I correspondlng to line 6-6 of Figs. I, II and against the gear by means of the coiled with the tool 16.

spring 25. In the event of the tool becoming wedged or set so that undue or dangerous stress would be imparted to the parts the friction driving connection slips and relieves the strain or prevents breakage.

The reciprocating hammer 17 is alined coiled spring 26 holds the hammer yieldingly in its retracted position so as to be engaged by the tappet 27 of the impact wheel 14. As the impact wheel revolves its tappet 27 strikes the hammer driving it forwardly against the tool.

The hammer has a rounded end, while the tappet' has a spherically curved bevel or recess 28 atits forward edge acting like a cam v in striking the hammer.

When it is desired to stop the hammer the stop 29 is released or adjusted to engage the collar 30 on the hammer 17 preventing its return to a position to be engaged by the impact wheel tappet. To facilitate this adjustment the stop is provided with a fingerpiece 31 and a coiled spring 32 which urges the stop forward when released,.tl1e spring 32 being of such tension or strength as to hold the hammer against the tension of its return spring 26. his stop 29 is provided with an adjusting cam 33 coacting with a cam 34. When in its released position the stop is projected forwardly a sufficient distance so that in engaging the collar 17 it prevents the return of the hammer to its initial position. j

The drill is retained in its socket by means of the impact bar 35 supported on the rods 36 in a spaced relation to the chuck so as to allow for the tool to move under the blow of the hammer and to receive the impact and retalicn the tool when the tool is not against wor The rods 36 are provided with-coiled.

springs 37 as clearly shown in Fig. II.

The locking bar 39 has elongated openings 40 through which the rods are arranged so as to'permit a limited sliding movement of the locking bar. The locking bar has a key-hole shaped slot 41 so that when in one position it engages the neck or reduced'por tion of the tool and when in another position brings the enlarged portion of the keyhole opening into register with the hole 38 in the impact bar to permitthe insertion and removal of the tool.v A key 42 is mounted on the locking plate so that it may be en a feature of advantage in riveting, that is,

the hammer may be thrown into and out of operation without stopping the motor which results in a great saving of time and also relieves the motor of the necessity for frequent starting and stopping In riveting the rotation of the tool is found to be of considerable advantage. In drilling the tool is advanced by means of the screw 43 having a handle 44 at its rear end, the frame being provided with a handle 45 in convenient position for the operator to grasp to steady the machine and direct the tool to its work.

With the parts arranged as described I provide a machine which is very eflicient and convenient to use. While the structure illustrated is especially designed as a rock drillI it may be used for riveting and like wor I have not attempted to illustrate or describe various modifications and adaptations and variations in structural details which I contemplate and which might be desirable to adapt the machineto certain classes of work, as I believe the disclosure made will enable those skilled in the art to which my invention relates to embody or adapt the same as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a structure of the classdescribed,

the combination with a frame, of a motor mounted thereon, a driving shaft, a tool chuck open to permit a tool to project there- -through disposed parallel to said driving shaft, driving connections for said driving shaft and chuck, a hammer alined with said chuck, a return spring for said hammer, an impact wheel on said driving shaft provided with a tappet on its forward face adapted to strike the hammer as the wheel revolves, a stop provided with an actuating spring, the tension of which exceeds that of the hammer return springso that when the stop is released the hammer is held out of the path of the impact tappet, and means for locking said stop in its inoperative position.

2. In a structure'of the class described,

the combination of a tool. chuck, a hammer,

a return spring for said hammer, a driven impact member, a stop provided with an actuating spring, the tension of which exceeds that of the hammer return spring so that when the stop is. released the ha'mmer is held out of the path of the impact member, and means for holding said stop in its inoperative position.

3. In a structure of the class described, the combination of a driving shaft, a chuck, a tool carried thereby, driving connections for said driving shaft and chuck including a friction means adapted to slip when the resistance to the rotation of the chuck exceeds a predetermined point, a hammer actuated through said driving shaft and acting upon the tool while being rotated by said chuck, means for supporting said hammer in inoperative position independent of the chuck driving means whereby the hammer may be operated to impart blows to the tool rotated by the chuck or rendered inoperative without stopping the chuck.

4. In a structure of the class described, the combination of a chuck, a tool carried thereby, driving means for said chuck, including a friction clutch adapted to slip when the resistance to the rotation of the chuck exceeds a predetermined point, a hammer acting upon the tool while being rotated by said chuck, means for supporting said hammer in inoperative position independent of the chuck driving means whereby the hammer may be operated to impart blows to the tool rotated by the chuck or rendered inoperative without stopping the chuck.

5. In a structure of the class described, the combination of a tool chuck, means for rotating said tool chuck, a hammer, a driven impact member for said hammer, a return spring for said hammer, a stop provided with an actuating spring, the tension of which exceeds that of the hammer return spring so that when the stop is released the 4 hammer is held out of the path of the impact member, and means for locking said stop in inoperative position.

6. In a structure of the class described, the combination of a tool chuck, means for rotating said tool chuck, a hammer, a driven impact member for said hammer, a return spring for said hammer, and a stop provided with an actuating spring, the tension of which exceeds that of the hammer return spring so that when the stop is released the hammer is held out of the path of the impact member.

In witness whereof I have hereunto set my hand and seal in the presence of two witnesses.

CORWILL JACKSON. [1,. s.]

Witnesses:

LUELLA G. GREENFIELD, MARGARET L. GLASGOW. 

